• 한국철도학회논문집
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• 제9권6호
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• pp.644-651
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• 2006

An application of concrete track is being actively processed for the construction of Korean railroad. The concrete track has an advantage to decrease the maintenance ire, but is very difficult system to maintain after earthwork settlement occurred. Therefore, the management and control of embankment and foundation settlement is very important for the successful concrete track construction. We expect that the main part of the settlement of the concrete track is the one of embankment and foundation supporting it. Settlements vulnerable to the concrete track among the causes of lots of settlements are primary consolidation and secondary compression settlement of foundation, creep settlement of embankment, settlement caused by train load, and unequal settlement resulting from the difference of embankment material and construction process. This paper investigated the settlement causes to make badly effects on the concrete track and also evaluated the settlement with field tests and numerical analysis.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.365-370
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• 2007

Foundation settlements(settlements at the embankment surface and ground) has been evaluating to satisfy the strict allowable residual settlement level from the start of the construction of Gyungbu high speed railway. This is because both embankment and ground settlement could be important to minimize the residual settlement after the construction of concrete track. Ground settlement is caused by the increase of effective stress resulting from embankment. The causes of embankment settlement could be come from different sources, for example, the increase of effective stress, rainfall, creep behaviors. Based on the field measured data, this paper analysed the settlement of ground and embankment settlement. The biggest settlement at the embankment surface was 9.7mm during 246days at the STA 000k922.5. The calculated settlement of embankment itself was 8.6mm at the same places. These results conclude that the compressive settlement of embankment could not negligible.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 1999년도 추계학술대회논문집
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• pp.219-224
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• 1999

The expansion of old road is needed in construction the entrance at the $\bigcirc$$\bigcirc$I/C road in $\bigcirc$$\bigcirc$city. To strength the national competition, many agents who concerned do their best for finishing that construction early as soon as possible. In generally, soil embankment on soft foundation is caused to reduce the stability by making the settlement of ground surface due to the over load. Thus, we try to make it stable by building EPS embankment construction which in our working place is one kind of the method of light embankment construction after excavating the original ground.

• 한국지반공학회지:지반
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• 제9권2호
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• pp.55-64
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• 1993

연약지반상에 댐이나 제방과 같은 토질구조물을 성토할 경우에는 구조물 뿐만아니라 기초지반에도 상당히 큰 변형이 일어나게 된다. 그러므로 성토에 의하여 최종적으로 형성된 토공단면은 연약기초지반에 놓여있는 형태가 아니라 제체의 일부가 연약점토지반 내로 치환된 형태가 된다. 본 연구에서는 축조재의 Dumping에 의하여 발생하는 치환깊이와 축조후 토공단면의 변형형태를 추정하고자 하였으며 제시된 이론과 수치해석 결과를 검증하고자 모형실험을 수행하였다. 또한 보강재 부설에 따른 보강효과도 관찰하였다.

• 한국농공학회지
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• 제37권5호
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• pp.101-110
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• 1995

The use of geotextile as reinforced materials in Soil structures has become widespread throughout the world. Geotextile reinforcement has been used in retaining walls, slope of embankment and especially soft foundation, etc. In the past, however, its design and construction have been performed empirically. In this study, to investigate of the effect of geotextiles reinforced slope of the embankment on a very soft foundation, a limit equilibrium analysis program calculating the safety factor of embankment on very soft foundation was developed. The study was focussed on such factors as type of geotextile, tensile strength, amount of reinforcement, and inclination of embankment. And the 4imit equilibrium analysis program was written on the basis of Low's slope stability theory with some modification. The following conclusions were drawn from this study. (1) The orientation of reinforcement can be assumed either horizontal or tangential to the slip circle. The factor of safety with tangential reinforcement is larger than that with the horizontal reinforcement. (2) In general, the factor of safety increases, as the slope reduces. However, it is preferable to use geotextiles with higher tensile strength rather than to reduce the slope of the embankment, because it is difficult to adjust the slope as desired. (3) The factor of safety obtained by numerical computation is affected only by the tensile strength, but not by the type of the geotextile.

• 한국안전학회지
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• 제15권1호
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• pp.146-152
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• 2000

To estimate the behavior of reinforced and unreinforced embankment constructed on a impermeable foundation ground, a laboratory model test was performed for two types of soils and water level increasing velocity of a flood period. The experiment models were constructed with slopes of water level is 1.25cm/min, 2.5cm/min each. From model test results, as the slope of reinforced and unreinforced embankment was the slower, the more seepage line rised. In the unreinforced embankment, the rising velocity of water level was the faster, the larger the embankment failure was. And the reinforced embankment with geotextile was the more safe than the unreinforced embankment for seepage force.

• 한국항만학회지
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• 제14권2호
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• pp.233-239
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• 2000

The expansion of old road is needed in constructing the entrance at the $\bigcirc$$\bigcirc$I/C road in $\bigcirc$$\bigcirc$city. To strength the national competition, many agents who concerned do their best for finishing that construction early as soon as possible. In generally, soil embankment on soft foundation is caused to reduce the stability by making the settlement of ground surface due to the over load. Thus, we try to make it stable by building EPS embankment construction which in our working place is one kind of the method of light embankment construction after excavating the original ground.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2005년도 춘계 학술발표회 논문집
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• pp.890-897
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• 2005

Stability of embankment is influenced on landfill condition, permeability, shear strength and soil engineering propensity and so on, and need examination in reply because is different according to change of soil property of foundation ground and permeability condition. Analyzed seepage behaviour by finite element method for embankment, and change permeability of base to analyze effect that permeability of ground water table formation before embankment and analyze seepage behaviour to typical embankment in this research. In the case of permeability of foundation ground is 10 more than landfill permeability, rise of groundwater table was changed slightly. Pore water pressure was decreased slowly in landfill after rainfall. The effect of permeability of foundation ground was effected in change of pore water pressure. For permeability of foundation ground is 10 more than landfill, stability of road landfill was small changed during rainfall. But in the case of permeability of base soil similar to landfill permeability, road landfill stability was large decreased during rainfall.

• 한국지반공학회지:지반
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• 제5권4호
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• pp.17-26
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• 1989

토질제체 설계시 piping에 대한 대책으로 현재에 적용되고 있는 creep비는 원래 Masonry 또는 콘크리트 댐의 저면과 기초지반토질과의 접촉면에 따른 침투에 의한 piping의 방지를 위한 기준이었다. 본 연구에서는 이 creep비가 토질로 형성된 제체에서도 적용될 수 있는지의 여부를 모형실험을 통하여 구명하고 현행 creep비기준을 재평가 하였다. 연구결과 토질제체에서 발생되는 piping파괴는 토질제체와 기초지반과의 확측면에서는 발생하 지 않았으며 토질종류에 관계없이 제체내에서만 발생하였다. 따라서 제체를 형성하는 토질과 기초 지반토질중 투수계수가 적은 토질을 기준으로 creep비를 정하는 현재의 설계기준은 불합리함을 알 수 있었다.

• 한국지반공학회논문집
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• 제20권7호
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• pp.57-68
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• 2004

연약점토지반에 성토 등의 상재하중을 재하하게 되면 측방유동이라고 하는 측방변위가 발생하게 된다. 이 측방유동은 파일기초의 변형, 교대의 이동, 지중매설관의 파괴 등 성토에 인접한 지중구조물에 피해를 가하게 된다. 그렇지만, 측방유동은 체적변형과 전단변형도 동시에 발생할 뿐만 아니라 이 측방유동에 영향을 미치는 인자가 많기 때문에 측방유동에 의해서 발생하는 측방토압의 발생 메커니즘이 아직 명확히 밝혀지지 않았다. 그리고 최근 근접시공 등 기존구조물에 근접해서 공사가 진행되는 경우가 많아 이러한 근접구조물에 어떠한 피해를 가할 것인가 또는 대책공법을 설계하기 위한 설계하중으로서 측방토압을 구해야 하는 필요성이 커지고 있는 것 또한 현실이다. 그러므로 본 연구에서는 성토에 의해서 연약지반에 발생하는 측방토압에 미치는 재하속도의 영향을 조사하기 위해서 실내모형실험을 실시하였다. 그 결과, 측방토압이 삼각형 분포를 이룬다는 것과 재하속도가 빠를수록 측방토압의 최대치가 커지고 부등침하가 커진다는 것을 알 수 있었다. 그리고 이러한 재하속도의 영향은 부의 dilatancy에 의한 과잉간극수압의 발생에 기인한다는 것을 알았다.